<template>
  <el-dialog width="500px" title="员工导入" :visible="showExcelDialog" @close="$emit('update:showExcelDialog', false)">
    <el-row type="flex" justify="center">
      <div class="upload-excel">
        <!-- accept=".xlsx, .xls" 用户可以选择的文件类型 -->
        <input ref="excel-upload-input" class="excel-upload-input" type="file" accept=".xlsx, .xls" @change="hChange" />
        <div class="drop">
          <i class="el-icon-upload"></i>
          <el-button type="text" @click="download">下载导入模板</el-button>
          <span>
            将文件拖到此处或
            <el-button type="text" @click="$refs['excel-upload-input'].click()">点击上传</el-button>
          </span>
        </div>
      </div>
    </el-row>
    <el-row type="flex" justify="end">
      <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
      <el-button size="mini" type="primary" @click="$emit('update:showExcelDialog', false)">取消</el-button>
    </el-row>
  </el-dialog>
</template>

<script>
import { getTemplate, impEmployees } from '@/api/employees'
import fileSaver from 'file-saver'
export default {
  name: 'EmployeesImportExcel',
  props: {
    showExcelDialog: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    async download() {
      console.log(11)
      const res = await getTemplate()
      console.log(res)
      fileSaver.saveAs(res, '员工信息模板.xlsx')
    },
    async hChange(e) {
      try {
        if (!e.target.files[0]) return
        // 获取 file 对象
        const file = e.target.files[0]
        // console.log(file)
        // 如果直接传普通对象 Content-Type 是 application/json
        // importExcel({ username: 'xxx', file: xxx })
        // 如果传入的是 FormData 对象, Content-Type 会自动设置为 form-data 格式
        const fd = new FormData()
        fd.append('file', file)
        // 将组装好的 FormData 对象传递给服务器
        await impEmployees(fd)
        // 提示用户
        this.$message.success('批量导入成功')
        // 关闭弹层
        this.$emit('update:showExcelDialog', false)
        // 重新加载数据
        this.$emit('success')
      } finally {
        // 不管成功还是失败, 都需要清空文件选择框
        // 目的是为了用户选择同一个文件也会继续上传
        this.$refs['excel-upload-input'].value = ''
      }
    }
  }
}
</script>

<style scoped lang="scss">
.upload-excel {
  display: flex;
  justify-content: center;
  margin: 20px;
  width: 360px;
  height: 180px;
  align-items: center;
  color: #697086;
  .excel-upload-input {
    display: none;
    z-index: -9999;
  }
  .btn-upload,
  .drop {
    border: 1px dashed #dcdfe6;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 160px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .drop {
    line-height: 40px;
    color: #bbb;
    i {
      font-size: 60px;
      display: block;
      color: #c0c4cc;
    }
  }
}
</style>
